4 years ago

Select TWO values of x that are roots

Mathematics

2 answers:

faltersainse [42]4 years ago

4 0

Answer:

answers are C and F above on Apex

Step-by-step explanation:

Sauron [17]4 years ago

3 0

$x_1=\dfrac{-b-\sqrt{b^2-4ac}}{2a};\ x_2=\dfrac{-b+\sqrt{b^2-4ac}}{2a}\\\\y=x^2+3x+5\\\\a=1;\ b=3;\ c=5\\\\b^2-4ac=3^2-4(1)(5)=9-20=-11\\\\x_1=\dfrac{-3-\sqrt{-11}}{2\cdot1}=\dfrac{-3-\sqrt{-11}}{2}\\\\x_2=\dfrac{-3+\sqrt{-11}}{2}$

Answer: A and B.

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in a survey 9 out of 10 doctors recommended a certain medicine if 80 doctors were surveyed how many doctors recommended the medi

ale4655 [162]

Answer:

72 doctors recommended the medicine

Step-by-step explanation:

The question above is interpreted thus.

9 out of 10 implies 9/10. If 80 doctors were surveyed, the number of doctors that recommended the medicine is 9/10 of 80 doctors. Therefore,

$\frac{9}{10} \: of \: 80$

$= \frac{9}{10} \times 80$

$= \frac{9 \times 80}{10}$

$= \frac{720}{10}$

$= 72$

Therefore, in a survey where 9 out of 10 doctors recommended a certain medicine; and 80 doctors were surveyed, 72 doctors recommended the medicine.

6 0

4 years ago

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aliina [53]

9x > 72
_ This is the line under the sign of at least.
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4 years ago

What is the area of a rectangle with width 2/5 in. and length 3/5 in

Oxana [17]

Area = Length * Width
A = 2/5 * 3/5
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In short, Your Answer would be Option B

Hope this helps!

4 0

3 years ago